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Cap measures roughly 3.25 – 3.5 inches in diameter

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= Observer’s choice
= Current consensus

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Bole’ appetit…
By: Jon S. (Joshrooma)
2017-10-27 16:57:50 CDT (-0400)

Since I’ve read these are edible. is there any best way to prepare them?

Bolete
By: Jason Bolin (j.bolin@outlook.com)
2017-10-26 22:12:47 CDT (-0400)

The faded staining is typical. These are great conversations and I think we are all learning by them. Please find more and post them.

Thank you
By: Jon S. (Joshrooma)
2017-10-26 22:02:01 CDT (-0400)

To say the least it is obvious you both have extensive knowledge and it is impressive. For what it’s worth the bluing has faded to a slate.

Jason,
By: I. G. Safonov (IGSafonov)
2017-10-26 21:26:46 CDT (-0400)

Thanks for your latest comment and clarification therein.
I just saw you post more rubricitrinus. What strikes me about that species, as seen in your collections, are the texture of the stipe (pruinose and dotted-punctate), the large amount of burgundy discoloration in lower stipe, and the gap between the tubes and the stipe apex. Sectioning shows that the tube layer is adnate to almost free, and perhaps that explains why this species is not reticulated. I also see the ridging/pseudoreticulation that your talk about in one of your posts.
Well, after this back-and-forth discussion, I am beginning to lean more toward roseopurpureus or its look-alike for this obsie…
Some boletes/bolete groups drove me crazy, so I started sequencing them. That provided some quasi-answers and in turn generated more questions… necessitating more follow-up sequencing. Either way, I see it as progress, even if the plot thickens, because we learn something new and because every story usually has an end. On the other hand no one can sequence every collection and answer all the questions.

Bolete
By: Jason Bolin (j.bolin@outlook.com)
2017-10-26 20:49:30 CDT (-0400)

Igor, I may not have been precise in what I was trying to say…

The “pseudoreticulation” I see with B. rubricitrinus is always due to age. I have never seen it with true reticulation. Sometimes it does appear to have very faint “longitudinal” ridges if you will, or maybe just a textured stipe. If I saw what first appeared to be B. rubricitrinus with ANY amount of reticulation below apex I would immediately investigate further because it wouldn’t fit my eye.

You are right about having it in hand… We have discussed this before. Very tough from pictures… That being said, in the observation you mentioned earlier, I feel like I see raised and course prominent reticulation in the middle of the stipe. That would be a red flag to me that it isn’t B. rubricitrinus and that it is probably roseopurpureus or something undocumented.

Regarding the staining… As you know staining can be variable based on a lot of factors. B. floridanus is a notorious blue stainer on every surface. It’s one of those that wants to stain when you breathe near it. However, I was recently collecting with the Bessettes and we found several examples that did NOT stain on stipe at all, even over time. Who knows, but it’s sure fun to speculate :)

Reticulation (EDITED)
By: I. G. Safonov (IGSafonov)
2017-10-26 20:32:01 CDT (-0400)

If you blow up the pix, you will see netted patches in the middle of the stipe. Unfortunately, there are no good pix of the apex, so its’ not clear if reticulation is found in the upper stipe/apex. According to Bessettes’ NAB and BENA, rubricitrinus can only be weakly reticulate in the apex, granted that exceptions can happen. Also, on second thought, the cap color of 295767 is more consistent with roseopurpureus. I don’t know… Sometimes your ID is only as good as the pix and/or the physical shape of the specimen in hand. Resolving the morphology of look-alikes has its limitations.
There has been a discussion of the difference between reticulation and pseudo-reticulation in obs 278679. I’ve seen reticulation in bolete in the middle of the stipe and not extending to the apex; it’s probably just an anomalous case of development. Reticulation just doesn’t appear in age; it’s there from the get go.
I am not sure about 215519/272870 being roseopurpureus on account of the unusual and reproducible staining action (gray, not blue). That’s why -870 is being sequenced. I am also sequencing another collection of Dario’s, obs 255139 that looks more like the typical roseopurpureus. For another of Dario’s roseopurpureus posts, see obs 280076.

Boletus
By: Jason Bolin (j.bolin@outlook.com)
2017-10-26 19:43:28 CDT (-0400)

Observation 272870 looks very B. roseourpeureus to me based on the reticulation.

The pore staining in the pictures of this observation are typical of a water logged B. rubricitrinus. I don’t see any reticulation on this observation but B. rubricitrinus definitely shows pseudoreticulation when it gets older as pores pull away from stipe.

I have a few posted observations that match pretty well with this observation. B. rubricitrinus is pretty common here and I see it quite a lot. I will post a few more observations of B. rubricitrinus… (3 new observations posted)

Another good way to test for rubies is the flavor of the cap. It’s slightly “lemony”.

Roseopurpureus vs rubricitrinus
By: I. G. Safonov (IGSafonov)
2017-10-26 19:25:45 CDT (-0400)

Unfortunately, I am not intimately familiar with either species. Looking at the pix, some reticulation or pseudoreticulation is visible in the stipe. This would favor roseopurpureus, but overall I agree with Jason’s proposal. It’s interesting that the stipe flesh doesn’t blue at all even though it’s supposed to for both species.
There is a third possibility, exemplified by obs 215519 from NC (Geoff Balme) and obs 272870 from VA (Dario Z.). That bolete stains gray or slate rather than blue or green and grows in mixed pine-oak woods. The stipe can be either smooth or prominently reticulate. Dario has posted many observations of this species from the last 2-3 years. A sample of 272870 has recently been submitted for sequencing.

Boletus
By: Jason Bolin (j.bolin@outlook.com)
2017-10-26 14:22:43 CDT (-0400)

This is a pretty textbook example of B. rubricitrinus IMO.

I see…
By: Jon S. (Joshrooma)
2017-10-26 12:48:30 CDT (-0400)

IGSafonov, I am pretty new to mushroom hunting and I appreciate the input…
what would you say that it is?

I made my ID…
By: I. G. Safonov (IGSafonov)
2017-10-26 11:58:37 CDT (-0400)

…when only the top three pix were available; others were added later. Obviously, this is not roodyi due to the heavy bluing.

Created: 2017-10-25 23:08:35 CDT (-0400)
Last modified: 2017-10-27 21:07:44 CDT (-0400)
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